地面兵装板块1月30日跌1.4%，中兵红箭领跌，主力资金净流出4.05亿元

Market Overview - The ground armament sector declined by 1.4% on January 30, with Zhongbing Hongjian leading the drop [1] - The Shanghai Composite Index closed at 4117.95, down 0.96%, while the Shenzhen Component Index closed at 14205.89, down 0.66% [1] Stock Performance - Notable stock performances include: - Changcheng Military Industry (601606) closed at 45.71, up 0.77% with a trading volume of 133,200 shares and a turnover of 610 million yuan [1] - Zhongbing Hongjian (000519) closed at 18.86, down 3.68% with a trading volume of 611,500 shares and a turnover of 1.151 billion yuan [2] - Beifang Navigation (600435) closed at 16.50, down 2.08% with a trading volume of 486,400 shares and a turnover of 801 million yuan [2] Capital Flow - The ground armament sector experienced a net outflow of 405 million yuan from institutional investors, while retail investors saw a net inflow of 436 million yuan [2][3] - Specific stock capital flows include: - Beifang Navigation had a net outflow of 6.5665 million yuan from institutional investors and a net inflow of 121 million yuan from retail investors [3] - Zhongbing Hongjian saw a net outflow of 11.2832 million yuan from institutional investors and a net inflow of 115 million yuan from retail investors [3]